Recognised as Colour

#FF2306

#FF2306
Red
Dark
Nearest: Red

#FF2306 is a red with RGB values 255, 35, 6 and HSL 7°, 100%, 51%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF2306#FF2306

HEX#FF2306

RGBrgb(255, 35, 6)

RGB (0–1)1, 0.1373, 0.0235

RGB percentages100%, 13.7%, 2.4%

HSLhsl(7, 100%, 51.2%)

HSV / HSBhsv(7, 97.6%, 100%)

CMYK0%, 86.3%, 97.6%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,720,646

CSS custom property--colour: #FF2306;

Brightness & contrast

Relative luminance0.22475WCAG 2.x, 0 is black and 1 is white

Perceived brightness142 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.5:1

Contrast with white3.82:1WCAG normal text: Fail

Contrast with black5.5:1WCAG normal text: AA

Greyscale equivalent#505050

Inverted#00DCF9

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726400no red cones; affects about 1% of men; ΔE 83.1 from the original

Deuteranopia#A69300no green cones; the most common form, about 1% of men; ΔE 82.3 from the original

Tritanopia#FF0023no blue cones; rare, and affects men and women equally; ΔE 11.2 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text3.82:1WCAG large text: AA

Contrast with black, large text5.5:1WCAG large text: AAA

Named colours

Red · ΔE 4 Orange red · ΔE 9.6 Tomato · ΔE 28.3 Crimson · ΔE 34 Firebrick · ΔE 38.4 Coral · ΔE 38.5

Nearest named CSS colourRed (#FF0000)ΔE 3.98, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#06E2FF

Analogous#FF0666, #FF9F06

Triadic#06FF23, #2306FF

Split complementary#06FFA0, #0665FF

Tetradic#66FF06, #06E2FF, #9F06FF

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FFD7D2

Lighter +30%#FFAA9F

Lighter +20%#FF7D6C

Lighter +10%#FF5039

Darker −10%#D21800

Darker −20%#9F1300

Darker −30%#6C0D00

Darker −40%#390700

More saturated +25%#FF2306

Less saturated −25%#E03B25

Channel breakdown

R255

G35

Red255 (100%)

Green35 (13.7%)

Blue6 (2.4%)

Hue6.99°

Saturation (HSL)100%

Lightness51.18%

Dominant channelRed

Hex per channelR FF · G 23 · B 06

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF2306 (chemical formula)

Formula
43,828.386 g/mol
2307 atoms

FF2306 has a molar mass of 43,828.386 g/mol, made up of 2307 atoms across 1 element: 2307 × F.

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Molar mass

Molar mass43,828.386 g/mol

Total atoms per molecule2307

Distinct elements1

Mass of one molecule7.2778747 × 10^-20 g

Molecules per gram1.3740275 × 10^19

Name

NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show

Composition by mass

F100%

Fluorine (F × 2307)43,828.386 g/mol, 100%

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Elements in this formula

Fluorine

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